We are offering providing and fixing of envirotech make , enviro-wd-1, doors is one of the best products to control noise and fulfilling a demand of a great way in the field of noise reduction.b) this composite is generally made of 12 mm thick commercial plywood at both side and 37 mm thick noise absorbing and dampening material filled in between both the ply acoustic material having a high physical. Mechanical, chemical properties and stability. Total thickness of door shutter will be 60 mm.